package com.heima.article.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.heima.article.service.ApArticleService;
import com.heima.article.service.ArticleFreemarkerService;
import com.heima.common.constants.ArticleConstants;
import com.heima.file.service.FileStorageService;
import com.heima.model.article.pojos.ApArticle;
import com.heima.model.search.vos.SearchArticleVo;
import freemarker.template.Configuration;
import freemarker.template.Template;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.StringWriter;
import java.util.HashMap;
import java.util.Map;

@Service
public class ArticleFreemarkerServiceImpl implements ArticleFreemarkerService {

    @Autowired
    private Configuration configuration;

    @Autowired
    private FileStorageService fileStorageService;

    @Autowired
    private ApArticleService apArticleService;

    @Autowired
    private KafkaTemplate kafkaTemplate;

    /**
     * 生成静态文件上传到minio中
     * @param apArticle
     * @param content
     */
    @Override
    @Async
    public void buildArticleToMinIO(ApArticle apArticle, String content) {
        //已知文章的id
        // 获取文章内容
        if (StringUtils.isNotBlank(content)){
            //文章通过freemarker生成html文件
            StringWriter out=new StringWriter();
            try {
                //获取模板
                Template template = configuration.getTemplate("article.ftl");
                //数据模型
                Map<String,Object> contentDataModel=new HashMap<>();
                contentDataModel.put("content", JSONArray.parseArray(content));
                //合成
                template.process(contentDataModel,out);
            } catch (Exception e) {
                e.printStackTrace();
            }
            //把html文件上传到minio中
            InputStream in=new ByteArrayInputStream(out.toString().getBytes());
            String path = fileStorageService.uploadHtmlFile("", apArticle.getId() + ".html", in);

            //修改ap_article表 保存static_url字段
            apArticleService.update(Wrappers.<ApArticle>lambdaUpdate().
                    eq(ApArticle::getId,apArticle.getId()).set(ApArticle::getStaticUrl,path));

            //发送消息 创建索引库
            createArticleESIndex(apArticle,content,path);

        }
    }


    //发送消息 创建索引库
    private void createArticleESIndex(ApArticle apArticle, String content, String path) {
        SearchArticleVo vo=new SearchArticleVo();
        BeanUtils.copyProperties(apArticle,vo);
        vo.setContent(content);
        vo.setStaticUrl(path);
        kafkaTemplate.send(ArticleConstants.ARTICLE_ES_SYNC_TOPIC, JSON.toJSONString(vo));
    }
}
